Lots of update does not mean it is going to be emulated well; If you looked at the changelog for the Wii version, you would have noticed those are only VERY minor changes, like adding support for SDHC or classic controller (Woow, it must have been very hard to achieve )

Most people see it's updated so they think people are working on hardly but the truth is that there haven't been ANY serious developper picking up this port yet, for the good reason that it's probably not worth it, Yabause should already be in a more mature state on PC platform (and have better compatibilty) before someone try to port it on less powerful platform, unless you only want to release some kind of Proof of Concept (and give people false hopes)